Under the Revolving Credit Facility, the Company has a total capacity of $700.0 million that may be used for a combination of cash borrowings and letter of credit issuances. At June 30, 2026, the Company had aggregate letters of credit outstanding in the amount of $4.8 million, primarily related to certain insurance policies as described in Note 2 - Significant Accounting Policies.

As of June 30, 2026, the Company had unconditional purchase commitments for diesel fuel and natural gas in the normal course of business in the aggregate amount of $3.1 million. Management does not expect any significant changes in the market value of these goods during the commitment period that would have a material adverse effect on the financial condition, results of operations or cash flows of the Company. As of June 30, 2026, the Company’s purchase commitments for the remainder of fiscal 2026 and for fiscal 2027 were as follows (unaudited, in thousands):

The Company has lease agreements associated with aggregates facilities under which the Company makes royalty payments. These agreements are outside the scope of Topic 842. The payments are generally based on tons sold in a particular period; however, certain agreements have minimum annual payments. The Company had commitments in the form of minimum royalties as of June 30, 2026 in the amount of $4.0 million, due as follows (unaudited, in thousands):

Royalty expense recorded in cost of revenue was $0.8 million and $0.8 million for the three months ended June 30, 2026 and 2025, respectively, and $2.3 million and $2.2 million for the nine months ended June 30, 2026 and 2025, respectively.